Most of the crash dumps shows BugCheck 7A KERNEL_DATA_INPAGE_ERROR.
The second parameter is c000009c which means the disk subsystem experienced a failure. Please follow the below steps.
KERNEL_DATA_INPAGE_ERROR (7a)The requested page of kernel data could not be read in. Typically caused by
a bad block in the paging file or disk controller error. Also see
If the error status is 0xC000000E, 0xC000009C, 0xC000009D or 0xC0000185,
it means the disk subsystem has experienced a failure.
If the error status is 0xC000009A, then it means the request failed because
a filesystem failed to make forward progress.
Arg1: fffff6e000000150, lock type that was held (value 1,2,3, or PTE address)
Arg2: ffffffffc000009c, error status (normally i/o status code)
Arg3: 0000000072fdd880, current process (virtual address for lock type 3, or PTE)
Arg4: ffffc0000002a090, virtual address that could not be in-paged (or PTE contents if arg1 is a PTE addres
1 . Replace the SATA cable if it is a desktop or remove and reconnect the hard drive if it is a laptop. This will solve any potential contact issues.
2. Run disk diagnostic.
Hard Drive Diagnostic Procedure
Since Samsung HDD division is now owned by Seagate, you can use Seagate saetools to to test the disk drive. What you need to run is the "Long Generic test" which scans the entire disk surface.
SeaTools for Windows | Seagate
3. If the drive passes the test, please turn off Fast Startup by reading instructions from the below link.
Fast Startup - Turn On or Off in Windows 8
This will solve STOP 0x7A with old storage controllers which are not really compatible with Windows 8.
Please post your findings in next reply.